Machine for forming cranks



' June 10, 1930.

MACHINE FOR FORMING CRANKS K. AUERBACH 1,763,338

2 Sheets-Sheet 1 Filed June 30, 1927;

INVENTOR lfqeL flusesnc/l June 10, 1930. K. AUERBACH 1,763,338

MACHINE FOR FORMING CRANKS Filed June 30, 1927 2 Sh t s 2 l l 1 E H22 5 5 =4 k g INVENTOR for; bending rod-likew blanks, and particularlye-fort: forming; cranks on: shafts, The type ofi machine which I; seek; to improve by my M present invention comprises two clamps or holdersa adapted-l t0): grasp therod or, sto k i at] eachxsidezofrtheaportion in, which the .bend

is tor be. formed; said: clamps being: Combined. with; mechanism for: varying,- the distanoeu between them, said clamps beingcoaxial aand the; distance-between, thel'flitbiflg' reducedwgradually duringthe formationof the;biendiorcranln The;portion.of;the work.

or: blah] between: said? clampsor.holders-is 1r1engagedwhy a1: member-1 movable transversely of the; blank axis In prior: constructions j 1 of-5 this; type, provision. has been; made, for

moving said intermediates member; trans- "versely; duringrtherentire time; that the diswzo-wtance xbqetvveen. the v other. two; members or clamps-.Wasrbeing reduced, andithis. result wasiobtained'; either by an operative connec- .tionwbetweenthev two .1 mechanisms efiecting longitudinal; and transverse movement, ref spectively 01: by means; of independent ,1 "mechanisms. I. haveiounjd that materially 1 improved results: are; obtained by employing 1 the. mechanism which moves: the intermediatetmember', only for starting the transverse a tmovementtoztisaid member, the, further transverse; movement; of? this member; not;1being I produced; by -any mechanism.acting thereon I it directly,butxresulting simply-1fromthetbendingi off'the intermediate blank portion due b toithe' relative longitudinal; movement of, the 1 clamps or holders at each; side otsuchwp-ontion.Other fieaturesof my: invention Will i j be pointed out hereinafter.

Without: desiring to. restrict myself, to the 33105 specific detailswillustratem I Wlll noW describe a .pretenred and satisfactory embodimerit .otti my invention, with reierence. to the i accompanying drawings, in Y which Eig. "1; is: a, front, ele-vation;v of" a crank-storming machine; of'myximproved;=type; Fig. 2 is an 1 end elevation thereot, looking; from the left I 1 of Fig 11 Fig. 3 is ac front elevation of the parts. shown at the central upper portion of Fig. 1:, with; a blank. positions and 1.1 is, a. detail end elevation of theinfigi jsr nunnniigngpn SAiALFELD-GlL-THE-SAALE, GERMANY, Assisnon'ro Henna-N r.

y y H nonvnnzonnnw YORK N Y l present invention relates to machines mien! ori ice MACH-Inn FOR ronivnne onAnKs" 1 Application fi1'ed'June-30, 1927, SerialNo. zoasss, andin GermanyJ'uly 15, 1926.

bend to the crank.

. The machine illustrated comprises a, base 1, With standards 2, 8 rising at theends thereof and carrying horizontal] guide or;

track. members 4, 5 respectively on. which the upsetting slides, clamps, orholders, 6, 7 respectively are adaptedto movein line with each other. These slidesmay be ot'any suitable construction, being provided, ior in- U stance, with hinged coversS, 9 respectively to enable upsetting. dies to be inserted, and removed, the. dies andfthe blank or stock therein,being held in place; in such clamps or hjolders by levers 10,11 pivoted. to said, holders or slidesL and having cam surfaces to-engage corresponding. faces on the 1 covers ,8, 9,, To each ofthe upsettingslides 6, 7

is secured rigidly a pair of longitudinal rods 12 011,13 respectively, provided 'vvith.

inner ends of said. screws constitutingthe .abutments proper Which engage the ends 1 of the blank. Q f

The mechanism for moving the slides 6, 7 toward eachother during the operation, and from each other after the completed crank shaft has been removed, consists of transverse bolts or pivots 17, 18 respectively, each; connected With the upper ends of a The lower ends of these rocker arms are tively fulcrumed at 23, 24; respectively on the upper portions oithe rocker arms are termediate member Which gives the initial I pair of. rocker arms 19, 2Q respectively,

connected pivotally with arms 21, 22 respecstationary brackets 25, 26 respectively. At

provided pivot bolts 27, 28 forconnection with the upperor outer ends. of rods. 29, 30 .1 respectively, preferably of the longitudinal-eXtensibletype; for instance, each of said rods may consist ofoppositelythreaded sections connected by a, nut or turnbuckle 31, 32 respectively.- The other ends of the con- :Q with crankipins -335w34"respectively on;clutgihycollzyf 7z;

to rotate withshaftsi 37, 38 respectively 91'; slide "161. isl jfirst gmoygdfupwardly; unti r v l and. dcapt h Togsal'cL upper end 118 'Whl 67 mounted On shaft, 68 urnaled in;

sired length: to the"- crank formed on the f shaft As soonras; the slide 6l is thus arrested, the further inward. movement of the with full cross-section, v since"- the material can not IYlGlCl or flezr in" any Clll'B'CtlOIl except asvmtended; The sides" or flanks: of; the

v lyrmoving upsetting1 slides 6, 7 and the intermediate transversely-moving? member 61, t Thelatter is made very'thin, so that the pin? of: the cranlr may hegiven different different: lengths betweenwthacover 68 and thempper port1on=orwseat 62 of the slide 61. The intermediatemember 61, 62, 63, 64:,

and in; this condition the machine may be toforimcollars on shaft or 1'od,.ei.ther, at

I-the: end onat=aniintermediate portiom:

Various; modifications may be made Without departingzafrom the nature of my inventionas setsforth inthe appendedclaims.

I: claim asmy invention: t r I l. A machine ofthe class ClQSCI'lbQd CODb prising; aligning: holders for a blank which it an intermediate;member arnangedx to engagektheiblank'between:saidholders, actuatingw mechanism temporarily operative for starting said intermediate member ina' direction transverse to the path of said hold-- ers: to impart an initial bend to theinteri "mediate:portionof said blanlnjsaid holders being; stationary relatively: to eachflother during the starting operation of said inter:- mediate member,mechanism operativesubseq'uently to the operation ot'said actu ating': meclianisnrfor moving said holders to- Ward each other wherebythe intermediate 1 portion of said blankis forced farther in saidtransverse direction to complete the bend therein, said intermediatemember continuing: to move in its transverse path in responseto the deflection: impartedto said intermediate portion of the blank by the pressure of the holdersmoving toward each a 1 termediate member in its transverse path of movement. l

l 21 A machine of the class describechcom- "prising;axially-aligning blankh'olders movtheirraxis, 1 an intermediate member. arranged a to: engagethe blank: between; said holders, actuating; mechanismr temporarily: operative mssgss's sliderfil at the propen point togive the de-,

1 'clampseor: slides-6; 7 Will upseenie shaft portio-n'between them The crank; is formed k 1 crank are:formedrbetwveenthe longitudinal-1 lengths-by inserting sleeves or bushings of 651 may be-removed readily fi'omithe machine 5 (bvpulling such member: out upwardly),

usedl for ordinaryupsetting operations, say

are movabletoivard and from each other,

j other, and a guide for maintaining the inablefrelatively toeach other lengthwise of for starting: said intermediate member: in a"d1rect1on transverse to said we, to give the blank anzflinitialilaterali bend, said: hold- I ere being; stationary relatively toaeach other during the-startingztoperation' ofrsaid iiitcn mediate? member,1mechanism?operative: snbsequently to the 0138121111011 of: said, actuatt mg mechanism tor: reducing: the distance between said; holderss whereby saidi blank,

pressure. of the holders moving toward: each other, and a guide for" confining, said: mean her to moven'lentv in saidi direction 1 as-rthe reduction of the distance between the holders vided- With an regulatable :stop tondeterniine the outward. stroke of-Zthe intermediate member. 1 a v v A macl'nne' according; to claim 1 ,111

Which the mechanism forsmovinggtheiali@- ing. holders comprises rocker arms, contit nected with said holders, cranln mechanisms with extensible connecting rods for operat ing said rocker anms, and a' drive :shaft coinlnontobot-h crank mechanisms:

A. machine according: to claim 1., in which; the mechanism for moving; the ali gning, holders comprises rockerarms connected With-1 Sdidl holders, connecting: rods for actuating'xsaidrocker armaand'a dnive shaft havingucrank mechanisn'is for openating; said" connecting rods:v

i 6; Ar lilachine according: to claiun 1, in

which the mechanism "ton moving; the: align ing holders comprises i'ocl ierarms connected with said holders, Yconnecting rods attachable to=said rockenarms at; points located at different distances fronn the axesv Gene 'reckingmovement, anda drive shafthaving connections for actuating said rods;

7. A, machine: according to clainn l, in

which: the mechanism for moving thealignmg holders COIHPHSGS rocker arms connected With said holders, andrprovidedivitliipivots receiving formations at diffcrentz distances froln the. axes-10f the rocking; movement oi said arms; connecting rods attachable to said rocker arms atr said::pivotereceiv-ing formations, saidrodsir r 8. A; machine according; to anal, in

which the mechanism for moving the: aligning holders comprises rocker armsaconnected With said holders, extensible connecting 'rods attachable to saidurockeraarms at, different distances from' the axes of. the rocking movement, and actuating: mechanism for saidirodsr i a 9-;A-nnach1ne accordingvytorclaim 2, in

and actuating:mechanism for t {temporarily operative, for moving said interyy ymediate member in a directiontransverse A to thatin which the movement of said holders takes place for imparting an initial bend jtothe blank, and an actuating device operj Native subsequently to the operation of said actuating mechanism for moving said alignping holders toward each other whereby said blank, at said initial bend, is forced farther laterally to complete said bend, said inter- 1 x mediate member continuing its transverse movement in response to the continued deflection of said blank at said bend, said actuating device comprising rocker arms connected with said holders, extensible con necting rods attachable to said rocker arms at different distances from the axes of the rocking movement, and operating mechannism for said rods. a

16. A machine of the class described, coma prising aligning blank holders movable relatively to each other to increase or diminish the distance between them, an intermediate member arranged to engage the blank between said holders, and formed with a rack, a starting mechanism, adapted to be temporarily operated manually, coa operating with said rack to start said intera a mediate member in a direction transverse to that in which the relative movement of said holders takes place for imparting an initial bend to said blank, and mechanism operative subsequently to the operation of said starta ing mechanism forreducing the distance between said holders whereby said blank, at said initial bend, is forced farther laterally to complete the bend therein, said intermediate member continuing its transverse movement in response to the continued deflection of said blank at said bend.

17. The process of forming lateral bends v in rodlike blanks, which consists in giving an initiallateral bend to the blank while It holding two of itsyportions in axial align R451 ment and stationary at a constant distance from each other at each side of such bend, and thereupon completingsuch lateral bend by reducing the distance between saidaxially-aligning portions and permitting the y bent intermediate portion of the blank to move outwardly to completion in response to the pressure exerted by the approach of saidaxially-aligning portions to each other, i y In testimony whereof, I have signed this R55 specification. a y KARL AUERBAOH.

i no 

